Global warming

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Transcript of Global warming

Global WarmingTHE ENVIRONMENTAll of the external factors affecting an organismAn Inconvenient TruthVideo-watching activitiesThe greenhouse effectThe sun’s radiation comes in the form of light waves and heats up the earth. Some of The radiation that is absorbed and warms the earth is re-radiated back into space in the form infrared radiation. Some of the outgoing infrared radiation is trapped inside the atmosphere. It keeps the temperature of the Earth within certain boundaries so it can be livable.FACTORS THREATENING THE ENVIRONMENTPopulation GrowthbioticabioticCONSTANT INTERACTIONECOSYSTEMGlobal warming: causes and effectsPopulation size and distribution of organismsinteraction Global WarmingDepletion of the Ozone LayerCONSEQUENCESNatural or human-made disruptionscarrying capacitydepends onEarth's climate variations-The measurements of atmospheric temperature show a continuous and intensifying increase, and at the time of the documentary the last years were the hottest ever measured. -High temperature records were broke in different cities throughout the planetCauses:-The impact of mankind's actions over the planet, such as POLLUTION: it causes retention of infrared radiation in the atmosphere.

-An increasing world population that demands more consumption of natural resources, thus damaging the environment.Effects-Climate change-Retreat of glaciers-Loss of ice in the polar ice cap-Flooding, drought and heath waves-Severe weather events worldwide-Sea level rising-Shifts in seasons-Increased insect infestationsScientific findings in the Antartic IceThe ice cores revealed that the levels of CO2 in the atmosphere through the years an the historic temperatures are related, and nowadays the amount of CO2 is higher than ever. This will continue to increase drastically in the next 50 years, thus provoking higher temperatures.Climate change predictions-Higher temperatures-Drought and frequent heath waves-Changes in season's durationsThe relationship between natural disasters and global warming-Ocean and wind currents distribute heath through the globe. An increase in the average temperature of the planet means varying increases in different areas of the world-Warmer ocean temperatures generate stronger stormsIncrement of population:77 millions each yearpollutiondestruction of habitatsadditional resources2000: 6.2 billion people

2050: 9.3 billion people

¿?Average global temperature:15 °Crise in sea levelsextinction of speciesdisruption of agriculturefrequency of severe disastersIncrement (Celsius):0.6 the past century1.4 to 5.8 the next centuryThe final factor that transforms our relationship to the earthOur collective nervous systemWe need a sudden jolt before we became aware of the danger."The era of procrastination, of half-measures, of soothing and baffling expedients, of delays, is coming to its close. In its place we are entering a period of consequences"

Sir Winston Churchill1970s Discovery of CFCs' effects Our ability to live in planet earth and have a future civilization is at stake.

THE SOLUTION IS IN OUR HANDS...

ARE YOU READY TO CHANGE THE WAY YOU LIVE?1987 Montreal ProtocolParadoxical effectsGlobal warming causes more flooding and more drought. It increases and relocates precipitations worldwide, and it also sucks moisture out of the soil. Understanding the EnvironmentEven minute actions in any factor in an ecosystem produce changesThe ozone layer may not fully recover until 2065